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I got some dust electrostatically stuck onto my planar diaphrams and it has caused some resonances that cannot be removed without cleaning.

I am trying to find some material that I can use to cover the diaphram without affecting the sound. I’ve tried a few foams and synthetic cottons which have audible transparency but they take the edge off of the bass.

Also the synthetic cotton just got micro fibers all over the diaphram adding to the dust issue.

Does anyone know a good material I can use for this purpose?
Appreciated.